What Lp(a) is, and how it differs from LDL
Lipoprotein(a), written Lp(a) and said "L-P-little-a," is a particle in the blood similar to LDL cholesterol but with an extra protein attached that makes it more prone to promoting artery plaque and blood clotting. Unlike LDL, which is heavily influenced by diet, exercise, and medication, Lp(a) is almost entirely determined by genetics, set at birth, and stays roughly the same throughout life regardless of lifestyle. Roughly 1 in 5 people has a level high enough to meaningfully raise cardiovascular risk, most without knowing it.
Why a normal LDL does not rule out this risk
Because Lp(a) is a separate particle from LDL, it is possible to have excellent LDL and cholesterol numbers on a standard panel and still carry significantly elevated cardiovascular risk from Lp(a) alone. This matters most for people with a family history of early heart attack or stroke that seems to run in the family despite otherwise normal cholesterol, since an inherited high Lp(a) is a common, under-recognized explanation.
What current guidelines recommend
Because Lp(a) does not change much over a lifetime, major lipid societies, including the National Lipid Association, now recommend it be checked once, for everyone, ideally by early adulthood, to reclassify overall risk. A high result does not change your LDL treatment goal, but it can shift a borderline decision toward earlier or more aggressive treatment of the risk factors that are modifiable, since there is not yet an FDA-approved medicine that lowers Lp(a) itself (though several are in late-stage trials).
Questions worth asking your doctor
- Has my Lp(a) ever been checked?
- Do I have a family history that would make this more important to know?
- If my Lp(a) is high, how does that change our plan for my LDL, blood pressure, and other modifiable risks?
- Should my close relatives be tested too, since Lp(a) is inherited?
Finding a doctor who checks Lp(a)
Every clinician in our lipidologists list has a verified license, board certifications on record, and a signed attestation to guideline-based lipid care, including advanced testing like Lp(a) when it matters. Search near you by specialty and city.
Common questions
Can I lower my Lp(a) with diet or exercise?
Not meaningfully. Lp(a) is determined almost entirely by genetics and does not respond to the diet, exercise, or weight changes that improve LDL and other lipid numbers.
Is there a treatment for high Lp(a)?
There is no FDA-approved medicine that specifically lowers Lp(a) yet, though several are in late-stage clinical trials. Today, a high Lp(a) result is used to guide more aggressive management of your other, modifiable risk factors.
References
- NLA Scientific Statement on Lipoprotein(a): Use in Clinical Practice (2024 focused update) (National Lipid Association, 2024)
